Can't find android device using “adb devices” command

Question

I am developing Android application on macOS and my application runs well on the emulator. I want to run it on the device, but when I run adb dev

Answer 1

I had this problem today where the phone was charging when connected, but wasn't seen by the Mac. It turned out the micro USB cable that I was using was for charging only and didn't do data. Once I changed the USB cable it started working fine.